Replace fuel filter · ap4720p0780t · Mercedes-Benz WIS

AP47.20-P-0780T

Replace fuel filter

11.08.2015

Engine	646.820/821/951/961, 647.961, 648.961 in model 211
Engine	646.962/963 in model 203
Engine	646.966 in model 209
Engine	648.960 in model 220

Modification notes

07.03.2013

Special information on removal of fuel hoses added

Step 5

P47.20-2220-09

Shown on model 211.026 with code 494 USA version

1	Cylinder head cover trim	4	Fuel filter	A	CLIC clamps
2	Fuel feed hose	5	Bolt
3	Fuel feed hose	B76	Fuel filter water level sensor

Shown on model 211.007 with engine 646.820

2	Fuel feed hose
2a	Fitting
3	Fuel feed hose
4	Fuel filter
6	Bow
7	Bracket
A	CLIC clamps

P47.20-2303-05

 	Remove/install
 Danger !	Risk of explosion caused by fuel igniting, risk of poisoning caused by inhaling and swallowing fuel as well as risk of injury to eyes and skin caused by contactwith fuel.	No fires, sparks, open flames or smoking. Pour fuels into suitable and appropriately marked containers only. Wear protective clothing when handling fuel.	AS47.00-Z-0001-01A
1	Switch off ignition
 Danger !	Risk of injury caused by fingers being jammed or pinched when removing, installing or aligning hoods, doors, trunk lid/rear-end door or sliding roof.	No parts of the body or limbs should be within the operating area when the components are moving.	AS00.00-Z-0011-01A
2	Open engine hood and raise to vertical position
		MODEL 203	AR88.40-P-1000P
		MODEL 209	AR88.40-P-1000Q
		MODEL 211	AR88.40-P-1000T
		MODEL 220	AR88.40-P-1000M
3	Remove cylinder head cover trim (1) or upper engine cover
		ENGINE 646, 647	AR01.20-P-5014-02A
		ENGINE 648	AR01.20-P-5014-02C
		 Installation: Install the cylinder head cover trim (1) or upper engine cover only after performing the leak test.
		 Bolt, cylinder head cover trim to cylinder head	*BA01.20-P-1002-01G
		 Bolt, cover to charge air manifold	*BA01.20-P-1003-01G
4	Remove the fuel filter water level sensor (B76)	With CODE 494 (USA version)
		Engine 648.961 in model 211.026 as of 4/12/04 with code 494 (US version)	AR47.50-P-0100T
5	Detach fuel feed hose (2) and fuel supply hose (3) of high-pressure pump from fuel filter (4)	 Do not use pointed or sharp-edged tools for detaching. The fuel feed hose (2) and fuel supply hose (3) will otherwise be damaged.
		 Removal: Vehicles with ENGINE 646Loosen the fuel feed hose (2) and fuel supply hose (3) by turning by hand (do not use any sharp-edged pliers), or push them off the fitting using a blunt object (plastic wedge) or a blunt or broad-edged tool. The fuel-resistant inner coating will otherwise be damaged, causing outward leakage of the low-pressure fuel hose. Detached hose particles can clog the cooling and lubricating throttle of the high-pressure pump. The return flow quantity of the high-pressure pump can decrease as a result, impairing the function of the suction jet pump in the tank  right half of the tank runs empty.
		 Installation: Do not use screw clamps or spring bracket clamps. Otherwise leaks may occur.
		 Installation: Replace CLIC clamps (A).
		 Collect any escaping fuel with an absorbent rag.
		Check fuel feed hose (2) and fuel supply hose (3) for damage. If necessary,
		
		replace the fuel feed hose (2) and fuel supply hose (3) subject to a separate repair order.
6	Loosen bolt (5) or lever up clip (6) and remove fuel filter (4) upwards	 ENGINE 646.8 Installation: Before closing the brackets (6), align the longitudinal axis of the fitting (2a) with the marking (arrow) on the bracket (7).
		 Bolt, clamp to fuel filter	*BA47.20-P-1003-02A
7	Install in the reverse order
8	Replace screw plug and both O-rings of water separator	With CODE U41 (Fuel/water separator and lubrication packet)
	Check
 Danger !	Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.	Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
9	Start engine and check fuel system for leaks

 Crankcase ventilation, cylinder head cover

Number	Designation		Engine 646.951/961, 647.961	Engine 646.8
BA01.20-P-1002-01G	Bolt, cylinder head cover trim to cylinder head	Nm	9	–

 Crankcase ventilation, cylinder head cover

Number	Designation		Engine 646.962/963/966	Engine 648
BA01.20-P-1002-01G	Bolt, cylinder head cover trim to cylinder head	Nm	9	9

 Crankcase ventilation, cylinder head cover

Number	Designation		Engine 646.951/961, 647.961	Engine 646.8
BA01.20-P-1003-01G	Bolt, cover to charge air manifold	Nm	9	–

 Crankcase ventilation, cylinder head cover

Number	Designation		Engine 646.962/963/966	Engine 648
BA01.20-P-1003-01G	Bolt, cover to charge air manifold	Nm	9	9

 Fuel filter

Number	Designation		Engine 646 except 646.98, engine 647, 648
BA47.20-P-1003-02A	Bolt, clamp to fuel filter	Nm	8

Referenced documents

ar0120p501402a Remove/install cylinder head cover trim
ar0120p501402c Remove/install cylinder head cover trim
ar4750p0100t Remove/install the fuel filter water level sensor
ar8840p1000m
ar8840p1000m Opening engine hood, moving to upright position and closing
ar8840p1000p
ar8840p1000p Opening engine hood, moving to upright position and closing
ar8840p1000q Open engine hood, move to upright position and close
ar8840p1000t Open engine hood, move to upright position, close
as0000z000501a Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.
as0000z001101a Risk of injury caused by fingers being jammed or pinched when removing, installing or aligning hoods, doors, trunk lid/rear-end door or sliding roof.
as4700z000101a Risk of explosion caused by fuel igniting, risk of poisoning caused by inhaling and swallowing fuel as well as risk of injury to eyes and skin caused by contactwith fuel.